A silvery vision of a dozen balloon-like dots hovering in yesterday’s clear-blue sky over West 23rd Street had thousands speculating the mysterious objects might be UFOs.

Callers began phoning the NYPD and Federal Aviation Administration at 1:30 p.m. with reports of the strange, silver objects high in the sky.

“Some people saw something described as yellow with blue lights surrounding it,” said FAA spokesman Jim Peters. He added that if the objects were weather balloons — as some suggested — his agency had no prior notification they’d be launched.